EP2167715B1 - Verfahren zum recycling von aus einem verfahren zur herstellung einer isolationsmatratze aus mineralfasern stammendem wasser - Google Patents

Verfahren zum recycling von aus einem verfahren zur herstellung einer isolationsmatratze aus mineralfasern stammendem wasser Download PDF

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Publication number
EP2167715B1
EP2167715B1 EP08806154.4A EP08806154A EP2167715B1 EP 2167715 B1 EP2167715 B1 EP 2167715B1 EP 08806154 A EP08806154 A EP 08806154A EP 2167715 B1 EP2167715 B1 EP 2167715B1
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Prior art keywords
binder
fiberizing
water
fiber
circuit
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English (en)
French (fr)
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EP2167715A2 (de
Inventor
Rémi Valero
Bernard Lericque
Alexis Ponnouradjou
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Saint Gobain Isover SA France
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Saint Gobain Isover SA France
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/002—Inorganic yarns or filaments
    • D04H3/004—Glass yarns or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/248—Moulding mineral fibres or particles bonded with resin, e.g. for insulating or roofing board
    • B29C67/249—Moulding mineral fibres or particles bonded with resin, e.g. for insulating or roofing board for making articles of indefinite length
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/10—Coating
    • C03C25/12—General methods of coating; Devices therefor
    • C03C25/14—Spraying
    • C03C25/146—Spraying onto fibres in suspension in a gaseous medium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/10—Coating
    • C03C25/24—Coatings containing organic materials
    • C03C25/26—Macromolecular compounds or prepolymers
    • C03C25/28—Macromolecular compounds or prepolymers obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C03C25/285—Acrylic resins
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/645—Impregnation followed by a solidification process
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/655—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions characterised by the apparatus for applying bonding agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/12—Nature of the water, waste water, sewage or sludge to be treated from the silicate or ceramic industries, e.g. waste waters from cement or glass factories
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/08—Corrosion inhibition

Definitions

  • the invention relates to the field of materials based on mineral fibers, especially mineral wool type glass wool or rock. More particularly, the present invention relates to a method and apparatus for recycling recovered water in a fiber drawing and shaping process, when an acidic binder, typically comprising a polyacid of the acrylic type, is used.
  • the majority of materials such as insulation panels or rolls currently marketed consist of a mineral wool mattress or felt comprising mineral fibers, such as glass fibers bonded by an organic binder.
  • the formation of the glass fiber mat comprises an internal centrifugal fiberizing process, examples of which are described in the applications EP 0 406 107 or EP 0 461 995 , to which reference may be made concerning the details of the steps already known for the implementation of the present invention, without the need here again to describe them extensively.
  • the binder used was predominantly of the phenol-formaldehyde type (also called formophenolic binder).
  • the residual heat of the mineral fibers and the blast of hot air created by suitable means through the fiber mat, received on a conveyor after fiberizing are sufficient to vaporize and eliminate the vast majority of the fibers. excess water contained in the initial binder composition.
  • the mineral wool mattress freed from most of its moisture, is then sent to a chamber or oven to complete the drying and bake the binder.
  • this firing is carried out under conditions that ensure both the final mechanical strength of the obtained mattress, because of the bond between the fibers, as well as its flexibility, that is to say, its ability to recover substantially its initial shape and thickness, after a step of strong compression especially necessary for its packaging and transport.
  • the current binder solutions also comprise, for example, urea, and are, before spraying the fibers, in the form of a solution or an aqueous dispersion of a solids content of between 30 and 60% by weight.
  • binder formulations may have the disadvantage of emitting, essentially during the mineral wool manufacturing process, very limited amounts of volatile organic compounds, often referred to as VOCs, particularly formaldehyde.
  • VOCs volatile organic compounds
  • the acrylic binder solution besides the polyacid, also comprises a polyhydric alcohol and a reaction catalyst, for example an organic phosphorous acid, as is for example illustrated by the patent. US5,661,213 .
  • the main problem related to the use of this type of resin lies in the acidity of the binder solution sprayed on the fibers at the level of the fiberizing chamber.
  • a pH of the solution generally less than 4 or even more often less than 3 or even 2.5 is necessary for the final production of a mattress having the good properties of use.
  • the water recycling loop from the fiber drawing process may incorporate the use of at least some or even all of the recovered water for the washing of the various constituent elements of the apparatus which makes it possible to obtain the fiber mat.
  • these apparatuses are those which are in contact with the binder solution and the fibers during the fiberizing process, in particular the walls of the fiber drawing chamber or hood, the means for conveying the fibers after fiberizing or else the ventilation means. implemented for the removal of excess water in the fibrous mat.
  • the recycling loop may also incorporate the use of at least some or even all of the recovered water, for washing and / or cooling fumes and gases generated in the process, such as gases from the oven for baking the binder or fiberizing unit.
  • a possible and obvious solution is to use pipes made of a metal known for its corrosion resistance qualities, such as stainless steel.
  • a metal known for its corrosion resistance qualities such as stainless steel.
  • such a solution involves a significant additional cost and does not guarantee sufficient efficiency over time, while posing maintenance personnel problems handling the liquids present in the circuit, especially if the latter must be purged or cleaned.
  • the experiments carried out by the applicant show that the pH variations within the circuit can evolve in a wide range around the neutrality, that is to say typically greater than 6, or even greater than 6.5 and below 9, or even below 8.5, without major problems of corrosion are observed over time on the pipes.
  • the present invention thus relates to a method for controlling the corrosivity level of an aqueous solution recovered during a process for producing a mineral fiber mat, in particular comprising fiberizing and bonding said fibers with a binder comprising a polyacid typically of acrylic type, said aqueous solution being recycled at least partly to a preparation zone of said binder and / or a washing zone of the production plant, the method being characterized in that the pH of the solution in the recycling circuit is maintained between minimum and maximum values by the introduction into said circuit of a modifying agent said pH such that a base, the flow rate of the pH-modifying agent being adjusted directly as a function of the acid binder flow rate introduced during the fiber-drawing process.
  • the flow rate of the pH modifying agent in the recycle circuit can be directly proportional to the flow rate of acidic binder introduced into the fiber drawing process.
  • the ratio R can be adjusted at regular intervals by a one-off measurement of the pH of the water recovered at the level of the recycling circuit.
  • the pH set point is from about 6 to about 9.
  • the waters of the fiberizing process are recovered at least in part at the fiber conveyor belt, after said fiber drawing.
  • the waters of the fiberizing process can also be recovered at least in part at the level of the reticulation oven of the mineral fibers.
  • the recovered water is at least partially used for washing at least one of the constituent elements of the device for obtaining the fiber mat, in particular the walls of the fiber drawing chamber or hood, the means for conveying the fibers.
  • the ventilation means put for the removal of excess water in the fibrous mat or the fiber crosslinking chamber.
  • the pH modifying agent is chosen from alkaline bases of the alkali or alkaline earth hydroxide or carbonate type.
  • the polyacid is generally chosen from polycarboxylic acids of the family of acrylic, methacrylic, crotonic, isocrotonic, maleic and cinnamic acids.
  • the invention furthermore relates to a plant for producing a fiber mat
  • a fiberizing unit incorporating means for spraying a solution of a binder comprising a polyacid which is typically of the acrylic type on the newly formed fibers, means receiving and conveying fibers impregnated with the binder to a cross-linking chamber and means for aspirating an aqueous solution comprising water and excess binder in the fiber mat received on the conveying means, said means for suction being in fluid communication with a recycle loop of said aqueous solution to a binder solution preparation station supplying the spraying means and / or to washing means of the installation, said installation being characterized in that it further comprises means for introducing and regulating a controlled amount of a modifying agent of said pH such that a base and in that said regulating means are subject to control means calibrated according to the amount of polyacid introduced into the fiberizing unit.
  • the fibering unit 1 itself is well known.
  • the fiberizing unit comprises a hood (not shown on the figure 1 ) surmounted by one or more centrifuges 2, 2 '.
  • Each centrifuge comprises a basket (not shown on the figure 1 ) for recovering the molten glass and a plate-shaped part 23 whose peripheral wall is provided with a large number of orifices.
  • the molten glass brought into a net 3 from a melting furnace (not shown) and first recovered in the basket of the centrifuge, escapes through the orifices of the plate 23 in the form of a multitude of filaments driven in rotation.
  • the centrifuge 2 is also surrounded by an annular burner 4 which creates at the periphery of the wall of the centrifuge a gaseous stream with a large
  • the fiberization according to this method is integral and produces 100% of useful fibers. The process also guarantees long, flexible fibers.
  • the torus 17 is closed by a gaseous stream of air introduced under pressure, schematized by the arrows 6.
  • the torus 17 is surrounded by a binder spraying device containing an aqueous solution of a polyacid typically of the acrylic type, of which only two elements 7 are represented on the figure 1 .
  • aqueous solutions of binder possible are those described in the publications US2003 / 221457 , US2006 / 198954 or US 7,153,437 .
  • the bottom of the fiberizing hood is constituted by a fiber receiving device comprising a conveyor 9 incorporating an endless belt permeable to gas and water, under which are arranged suction boxes 10 and separation of the fluids contained in the neoformed mattress, resulting from the fibering process described above.
  • the suction chambers 10 are for example connected to a fan (not shown in FIG. figure 1 ) to keep them in depression.
  • the fluids are gases such as air and fumes as well as an excess aqueous phase incorporating the excess binder as well as fines. It forms on the conveyor belt 9 a mat 11 of glass wool fibers intimately mixed with the binder.
  • the mattress 11 is led by the conveyor to an oven or chamber 12 for crosslinking.
  • This chamber 12 is usually constituted by a closed chamber comprising a series of caissons or compartments fed by hot air burners circulated by fans (not shown in FIG. figure 1 ).
  • the speaker is for example crossed by two complementary conveyors 13, 14 for transport and calibration.
  • the conveyors 13, 14 compress the mattress to give it the desired thickness.
  • the desired thickness For example, for a rolled felt, it is typically between 10 and 150 mm, the density of the glass wool layer being for example between 10 and 100 kg / m 3 .
  • Cooking in the chamber 12 induces the evaporation of the residual water in the form of fumes which are recovered and treated at the outlet of the enclosure, as well as the crosslinking of the binder between the fibers of the mattress.
  • FIG. 1 there is shown a fiber receiving and conveying system comprising an endless belt system.
  • the present method can also be implemented by a system comprising a plurality of receiving zones each corresponding to one or more fiber-drawing machines, each receiving zone being constituted for example by a pair of drums driven in inverse rotation, according to the principles illustrated by the patent EP 0 406 107 .
  • the diagram of the figure 2 illustrates a schematic and synoptic view, incorporating the fiberizing device according to the figure 1 , an embodiment of a line according to the invention for producing insulating panels based on glass wool, incorporating a circuit for recycling excess water from the fiberizing device described above.
  • the fiberizing device 1 makes it possible to obtain, on the belt conveyor 9, a mat of fibers impregnated with the acrylic solution, which is then shaped and cooked in the enclosure 12, and then submitted to other well-known operations such as cutting edges, longitudinal and / or transverse cuts, surfacing etc., within various devices 102 of known technology.
  • the dashed arrows indicate the direction of advance of the fiber mat in the installation.
  • the endless belt of the conveyor 9 is permeable to fluids such as fumes and excess water, which are sucked by the caissons 10.
  • Collection means 210 of the aqueous phase, incorporating the excess binder and that fines, are arranged under the suction means 10. According to the invention, these means 210 are in fluid communication with a recycle circuit 300 water to the fiberizing device 1.
  • the lines of the recycling circuit 300 are indicated with solid lines, the arrows indicating the direction of circulation of the aqueous solution in the pipes.
  • the water recovered by the collection means 210 is then transferred to a filtration device 103, configured to remove particles and fibers with a diameter greater than 500 microns.
  • the aqueous phase is transferred to a tank 104 kept stirring.
  • the tank 104 may be placed in fluid communication with a reservoir 105 containing a base solution, for example as described in the publications US2003 / 221457 , US2006 / 198954 or US 7,153,437 .
  • the basic solution is introduced into the tank 104 via a regulating means 106 such as a pump and / or a valve.
  • the amount of base introduced makes it possible to maintain the pH in a value range for which the metal constituting the conduits of the circuit 300 is preserved.
  • the pH range can vary from several pH units around neutrality without the equipment being substantially affected over time.
  • the solution finally obtained after introduction of the base is then at least partially recycled to a station 101 for preparing the aqueous solution of acrylic binder, another part may optionally be used for washing the boxes 10 or movable walls of the fiber hood.
  • a second filtration device 107 disposed at the outlet of the tank 104, allows the removal of particles and fibers whose diameter is greater than 50 microns.
  • the station 101 for preparing the aqueous solution of the binder is fed with a resin of the polyacid stored in a container 100, most often in the form of an already prediluted aqueous solution, typically containing about 50% by weight of solid.
  • a resin of the polyacid stored in a container 100, most often in the form of an already prediluted aqueous solution, typically containing about 50% by weight of solid. Examples of such compositions are for example described in the publications US2003 / 221457 , US2006 / 198954 or US 7,153,437 .
  • the aqueous binder composition injected by the spraying devices 7 (cf. figure 1 ), is prepared in the station 101 from the solution from the container 100 whose title is well known. At the station 101, this initial solution is diluted in the proportions necessary for the implementation of the fiber drawing process. The dilution is carried out according to the invention at least in part due to the aqueous solution from the recycling circuit 300. Of course, although not represented on the figure 2 , auxiliary means of clean water are also provided, at the station 101 or alternately on an element of the recycling circuit 300 or at the tray 104.
  • the acrylic-based sizing compositions are characterized by a greater quantity of water than the formalophenolic type solutions, the weight percentage of the solids content of the solid binder in the sizing composition not exceeding in general not 20% weight, which explains that the quantities of water circulating in the circuit 300 are relatively important as well as the economic and environmental importance of such recycling.
  • the flow rate or the injected amount of acidic binder contained in the container 100 is regulated by a measuring and control device 110.
  • the regulation means 106 of the flow rate of the base is subjected to the device 110.
  • the device 110 controls, according to the measurement of the resin / acid binder flow and via the means 106, the introduction into the tank 104 of a predetermined quantity of base according to a simple relation between the flow rate of the acidic binder and the flow rate of the basic solution.
  • the introduced base flow rate is directly adjusted according to this new value without it being need to involve probes or sensors, as described in the prior art.
  • any variation in the acid binder flow rate during the fiberizing process causes a modification and adjustment of the flow rate of the pH-modifying agent, making it possible to simply, safely and economically control the pH in the recycling circuit.
  • the device 110 comprises, for example, a sensor such as a flowmeter associated with a logic and an actuator, for example of the control valve or dimmer type. These last two systems make it possible to impose the controlled flow rate of the basic solution.
  • the device 110 is not limited to this single embodiment, any equivalent or alternative device or system that can be used without departing from the scope of the present invention.
  • the ratio R can be defined from the chemical characteristics of the constituents of the sizing composition (number of acid functions provided by the sizing constituents and associated acid constants pK A ) of the process parameters (introduction of dilution water) and of the installation (efficiency) and according to the basic type used as a neutralizing agent (constant of basicity pK B ).
  • the ratio R between the acid binder and base solution flow rates by spot measurements of the pH of the aqueous solution at one or more points in the circuit. recycle.
  • the tests carried out by the applicant have shown that pH measurements carried out on the line 300, spaced several minutes, even several tens of minutes and sometimes even several hours, were nevertheless sufficient to detect and remedy a possible drift and in the end to eliminate any risk of corrosion of the pipes.
  • This pH uptake does not require excessive precision and can be done simply by an operator by immersing a simple pH paper in an aliquot of liquid taken at any point of the recycle circuit 300. It has thus been verified that the pH of the water Recycling could freely fluctuate during a production wave in a wide range from about 6 to about 9, with no noticeable degradation of equipment.
  • the relationship between the flow rate of the acid binder and the flow rate of the base solution can be materialized in the form of pre-established charts, and for example characteristic of the installation in the presence.
  • the figure 3 illustrates an alternative embodiment, wherein the loop 300 for recycling water from the fiberizing process incorporates the use of a portion of the recovered water for washing the walls of the chamber or fiber hood.
  • Additional means of collection 201 allow the recovery of wash water from the walls of the fiber hood.
  • These means 201 are connected to the recycle circuit 300 of the water from the suction boxes 10 by additional conduits 301.
  • the water recovered from the collection means 201 and 210 are thus mixed in the circuit 300.
  • part of the water recovered in the circuit 300 may also come from a unit for washing gases from the fiberizing unit 1.
  • the recovery water is filtered in the device 103 and neutralized in the tank 104. A part of the treated water is then directed to the station 101, as described above in connection with the figure 2 , while another part is collected in a well 108, before being reused for washing the walls of the fiber hood 1.
  • the figure 4 illustrates an embodiment identical to the previous one, but in which the loop 300 for recycling water from the fiber-drawing process incorporates the use part of the water recovered both for washing the walls of the chamber or fiberizing hood and for the removal of the binder and fiber residues in the oven 12.
  • recovery means 212 of the washing water of the oven 12 and / or fumes from it are provided in addition, and additional conduits 302, allowing on the one hand the introduction of water recovered in the loop 300 and secondly to reinject a portion of the treated water at the level of the tank 104 to the oven 12 or the system for washing the fumes emanating therefrom, as illustrated in FIG. figure 4 .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Dispersion Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Nonwoven Fabrics (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)
  • Inorganic Fibers (AREA)

Claims (10)

  1. Verfahren zum Steuern des Korrosionspotentials einer wässrigen Lösung, welche während eines Verfahrens zur Herstellung von Mineralfasermatten rückgewonnen wird, insbesondere die Zerfaserung und das Binden der Fasern mittels eines Bindemittels umfassend, welches eine Polysäure, typischerweise eine Polyacrylsäure ist, wobei die wässrige Lösung wenigstens zum Teil in einem Herstellungsbereich des Bindemittels und/oder einer Waschzone der Produktionsanlage wiederverwendet wird, wobei das Verfahren dadurch gekennzeichnet ist, dass man den pH der Lösung in dem Recycling-Kreislauf zwischen Minimal- und Maximalwerten hält, indem man dem Kreislauf ein pH-Modifikationsmittel, wie zum Beispiel eine Base, zuführt, wobei der Zustrom des pH-Modifikationsmittels als direkte Funktion der Bindemittel-Säure eingestellt wird, welche während des Zerfaserungsprozesses zugeführt wird, ohne Verwendung von Regelvorrichtungen, welche kontinuierlich Messsonden für den pH-Wert oder den Korrosionszustand der Kreislaufleitungen abfragen.
  2. Steuerverfahren nach Anspruch 1, bei welchem der Zustrom des pH-Modifikationsmittels in dem Recyclingkreislauf direkt proportional dem Fluss der Bindemittel-Säure ist, welche in den Zerfaserungsprozess eingebracht wird.
  3. Steuerverfahren nach Anspruch 2, wobei man in regelmäßigen Intervallen das Verhältnis R durch eine punktuelle Messung des aus dem Recyclingkreislauf wiedergewonnenen Wassers einstellt.
  4. Steuerverfahren nach einem der vorhergehenden Ansprüche, wobei der pH-Wert zwischen 6 und 9 liegt.
  5. Steuerverfahren nach einem der vorhergehenden Ansprüche, wobei das Wasser des Zerfaserungsprozesses wenigstens zum Teil nach der Zerfaserung auf Höhe des Fasertransportbandes wiedergewonnen wird.
  6. Steuerverfahren nach einem der vorhergehenden Ansprüche, wobei das Wasser des Zerfaserungsprozesses wenigstens zum Teil auf Höhe des Aushärteofens für die Mineralfasern wiedergewonnen wird.
  7. Steuerverfahren nach einem der vorhergehenden Ansprüche, wobei das wiedergewonnene Wasser wenigstens zum Teil zum Spülen wenigstens eines Bauelementes der Vorrichtung zum Erhalten von Fasermatten verwendet wird, insbesondere der Kammerwände oder dem Fallschacht, die Fasertransportmittel, die Absaugvorrichtungen, welche zur Beseitigung des Wasserüberschusses in den Fasermatten eingesetzt werden, oder zusätzlich der Aushärteeinrichtung für die Fasern.
  8. Steuerverfahren nach einem der vorhergehenden Ansprüche, wobei das pH-Modifikationsmittel aus Alkalihydroxidbasen oder Alkalicarbonaten oder Erdalkalicarbonaten ausgewählt wird.
  9. Steuerverfahren nach einem der vorhergehenden Ansprüche, wobei die Polysäure ausgewählt wird aus der Gruppe bestehend aus: Acrylsäuren, Methacrylsäuren, Crotonsäuren, Isocrotonsäuren, Maleinsäuren, Zimtsäuren.
  10. Produktionsanlage für Fasermatten, umfassend ein Zerfaserungsaggregat (1), mit einer Zerstäubungseinrichtung (7) für eine Bindemittellösung auf den neu gebildeten Fasern, wobei das Bindemittel eine Polysäure umfasst, welche typischerweise vom Typ einer Acrylsäure ist, Mitteln zur Aufnahme und zum Fördern (9) der bindemittelimprägnierten Fasern in Richtung einer Aushärteeinrichtung (12) und Mitteln zum Absaugen (10) einer wässrigen Lösung, welche Wasser und das Bindemittel im Überschuss aus den Fasermatten, welche sich auf den Fördereinrichtungen (9) befinden enthalten, wobei die Absaugeinrichtung (10) in Flüssigkeitsverbindung mit einer Recyclingschleife (300) der wässrigen Lösung in Richtung einer Herstellungseinrichtung für das Bindemittel (101) steht, welches der Zerstäubereinrichtung (7) zugeführt wird und/oder welches der Einrichtung zum Spülen der Anlage zugeführt wird, wobei die Anlage dadurch gekennzeichnet ist, dass sie unter anderem Mittel zur Einführung einer Regelung (105, 106) einer kontrollierten Menge eines Modifikationsmittels für den pH umfasst, beispielsweise eine Base und wobei die Mittel zur Regelung (105, 106) Steuereinrichtungen (110) unterworfen sind, welche kalibriert sind als Funktion der Polysäuremenge, welche in das Zerfaserungsaggregat (1) eingebracht wird, wobei die Vorrichtung keine Steuervorrichtung aufweist, welche kontinuierlich Messsonden für den pH-Wert oder den Korrosionszustand der Kreislaufleitungen abfragt.
EP08806154.4A 2007-07-04 2008-07-02 Verfahren zum recycling von aus einem verfahren zur herstellung einer isolationsmatratze aus mineralfasern stammendem wasser Active EP2167715B1 (de)

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FR0756267A FR2918365B1 (fr) 2007-07-04 2007-07-04 Procede de recyclage des eaux issues d'un procede de fabrication d'un matelas isolant de fibres minerales
PCT/FR2008/051230 WO2009007648A2 (fr) 2007-07-04 2008-07-02 Procede de recyclage des eaux issues d'un procede de fabrication d'un matelas isolant de fibres minerales

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US20120144868A1 (en) * 2010-12-09 2012-06-14 Owens Corning Intellectual Capital, Llc Apparatus and method for controlling moisture in the manufacture of glass fiber insulation
ES2441428B1 (es) * 2012-07-04 2016-02-05 Abengoa Solar New Technologies, S.A. Formulación de tintas con base de nanopartículas cerámicas
FR2994201B1 (fr) * 2012-07-31 2014-08-08 Saint Gobain Isover Procede de cuisson d'un matelas continu de fibres minerales ou vegetales
FR3101343B1 (fr) 2019-09-26 2021-10-22 Saint Gobain Isover Methode de recyclage des eaux issues d’un procede de fabrication d’un matelas de fibres minerales
EP3835276A1 (de) * 2019-12-10 2021-06-16 Saint-Gobain Isover Verfahren zur herstellung von mineralwollverbundwerkstoffen
JP2023509547A (ja) * 2020-01-09 2023-03-08 サン－ゴバン イゾベール ミネラルウールをベースとした遮断製品の製造方法
FR3112595B1 (fr) * 2020-07-20 2022-06-17 Saint Gobain Isover Procédé de ventilation d’une étuve.

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US3966600A (en) * 1975-03-28 1976-06-29 Amchem Products, Inc. Process for the treatment of waste water from a fiberglass manufacturing process

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US3022A (en) * 1843-03-30 Machine for bending stibrups for paddle-wheels of steam and other
JPS58207115A (ja) * 1982-05-27 1983-12-02 Toshiba Corp 薬品注入制御装置
JP2002177945A (ja) * 2000-12-15 2002-06-25 Meidensha Corp 水質計測システム
US7153437B2 (en) * 2004-06-25 2006-12-26 Johns Manville Controlling corrosion in process water systems
KR100712970B1 (ko) * 2005-03-03 2007-05-02 롬 앤드 하아스 컴패니 부식을 줄이기 위한 방법

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US3966600A (en) * 1975-03-28 1976-06-29 Amchem Products, Inc. Process for the treatment of waste water from a fiberglass manufacturing process

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FR2918365B1 (fr) 2009-09-25
FR2918365A1 (fr) 2009-01-09
DK2167715T3 (en) 2016-08-01
JP2010532739A (ja) 2010-10-14
WO2009007648A2 (fr) 2009-01-15
CA2691603C (fr) 2015-05-12
PL2167715T3 (pl) 2016-10-31
EP2167715A2 (de) 2010-03-31
US20100192636A1 (en) 2010-08-05
CA2691603A1 (fr) 2009-01-15
WO2009007648A3 (fr) 2009-08-20
ES2582202T3 (es) 2016-09-09
JP6121087B2 (ja) 2017-04-26

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